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109e39c75c2a96083f5045d654f8750dce516c3f
carbon-lang/toolchain/check/testdata
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Ivana Ivanovska 109e39c75c Add support for nullptr literals in macros (#6426) 
Adding support for macros that evaluate to nullptr literal.

Demo:

```c++
// macros.h
void foo(int a[2]);
#define MyNullPtr nullptr
```
```c++
// macros.cpp
void foo(int a[2]) {
  if (!a) {
    printf("array a is nullptr\n");
    return;
  }
  printf("a[0] = %d \n", a[0]);
}
```

```c++
// main.carbon

library "Main";

import Cpp library "macros.h";

fn Run() -> i32 {
  Cpp.foo(Cpp.MyNullPtr);
  return 0;
}
```

```
$ clang -c macros.cpp;
$ bazel-bin/toolchain/carbon compile main.carbon
$ bazel-bin/toolchain/carbon link macros.o main.o \--output=demo_carbon
$ ./demo_carbon
array a is nullptr
```

Part of #6303
2025-11-24 21:03:35 +00:00
..
alias
Allow deduction of tuple and struct literals as symbolic generic facet types (#6365)
2025-11-13 20:17:44 +00:00
array
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
as
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
basics
In import, replace MakeSelfSpecific with GetOrAddLocalSpecific (#6409)
2025-11-20 21:44:10 +00:00
builtins
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
choice
Allow deduction of tuple and struct literals as symbolic generic facet types (#6365)
2025-11-13 20:17:44 +00:00
class
Replace pending generic logic with work stack-based logic (#6404)
2025-11-20 01:02:18 +00:00
const
Remove support for addr (#6375)
2025-11-18 19:48:58 +00:00
deduce
Replace pending generic logic with work stack-based logic (#6404)
2025-11-20 01:02:18 +00:00
eval
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
facet
Type completion of facet types is separate from Identifying (#6385)
2025-11-21 22:28:08 +00:00
for
In import, replace MakeSelfSpecific with GetOrAddLocalSpecific (#6409)
2025-11-20 21:44:10 +00:00
function
Replace pending generic logic with work stack-based logic (#6404)
2025-11-20 01:02:18 +00:00
generic
Type completion of facet types is separate from Identifying (#6385)
2025-11-21 22:28:08 +00:00
global
Allow deduction of tuple and struct literals as symbolic generic facet types (#6365)
2025-11-13 20:17:44 +00:00
if
Separate binding insts for refs and values (#6235)
2025-10-23 01:46:24 +00:00
if_expr
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
impl
Type completion of facet types is separate from Identifying (#6385)
2025-11-21 22:28:08 +00:00
index
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
interface
Type completion of facet types is separate from Identifying (#6385)
2025-11-21 22:28:08 +00:00
interop/cpp
Add support for nullptr literals in macros (#6426)
2025-11-24 21:03:35 +00:00
let
Replace pending generic logic with work stack-based logic (#6404)
2025-11-20 01:02:18 +00:00
main_run
Finish renaming BindName and related insts. (#6281)
2025-10-28 17:17:38 +00:00
named_constraint
Type completion of facet types is separate from Identifying (#6385)
2025-11-21 22:28:08 +00:00
namespace
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
operators
Replace pending generic logic with work stack-based logic (#6404)
2025-11-20 01:02:18 +00:00
package_expr
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
packages
Make generic decl resolution happen during non-pending import flow (#6394)
2025-11-19 21:54:25 +00:00
patterns
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
pointer
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
primitives
Finish renaming BindName and related insts. (#6281)
2025-10-28 17:17:38 +00:00
return
Replace pending generic logic with work stack-based logic (#6404)
2025-11-20 01:02:18 +00:00
struct
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
tuple
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
var
Switch the prelude to use ref instead of addr (#6359)
2025-11-14 00:40:26 +00:00
where_expr
Allow deduction of tuple and struct literals as symbolic generic facet types (#6365)
2025-11-13 20:17:44 +00:00
while
Add basic support for strings to core, check, and lower. (#5963)
2025-08-20 00:18:50 +00:00